Aes And Add _ Decryption Algorithm Of Elliptic Curve In The Application Of The Electronic Mail System

With computer network becomes more and more powerful, its social impact isprofound in21century. Contritely, network security gradually becomes a potentiallybig issue. Computer system is vulnerable to viruses, hackers, malicious software attacksas a result of its diversity, inequality, openness, interoperability and other features.Essentially, network security is to protect network from the destruction of accidental ormalicious attacks. Network security includes network hardware, software andinformation through network transmission’s security. Network security has two aspects,technical aspects and management issues, which complement each other indispensably.Core of information security technology is cryptography technique, which mainlyis a consisted technique of cryptography coding and cryptography analysis. The mainduty of cryptography coding technique is to seeking high-security and effectivecryptographic algorithm and protocol to meet demand of information encryption orattestation. However, the major task of cryptography analysis is to deciphering codesand fabricating certificate information to steal confidential messages or carry out fraudand sabotage activities. Cryptography coding and cryptography analysis’s antithesisand dependence have made cryptography technique develop rapidly.This thesis try to find a combined data encryption system, hybrid cryptosystem tomix AES algorithm and Elliptic Curve Cryptography (ECC) system based on existinganalysis of data encryption system. It will achieve more efficient networkcommunication system’s information encryption, digital signature and authenticationand solve the issue of un-coexisting of speed and security. Firstly, the thesis simplyintroduces the current status of information security, basic concepts and mathematicalmodel of data encryption technology. Based on these introduction, thesis analysis thetheory of encryption, decryption process, and offers symmetric passwords,mathematical background and characteristics of public key password system. Secondly,the author brings forward a combined data encryption system to mix AES and (ECC),depending on data encryption features. And then the article has detailed discussion oftheir mathematical principles, algorithms, security, etc. Meanwhile, the author puts forward the function theory of the hybrid cryptosystem. Finally, a program ofapplication of mixture of AES and ECC cryptography used in the Southwest SecureE-mail traffic information network service system is discussed. Hybrid cryptosystemcombines advantages of ECC short key cryptosystem, less computing overhead, lowbandwidth requirements, fast computation speed and also AES algorithm’sfull-performance of high security, effective solution to e-mail confidentiality,authentication, integrity and non-repudiation，effectively combined with AES andElliptic curve cryptography in the development of e-mail system.